RRI Digital Repository >
07. Theoretical Physics >
Research Papers (TP) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5216

Title: Localization of isolated holes in Mott insulator and delocalization by pairing
Authors: Kumar, N.
Issue Date: 1990
Publisher: The American Physical Society
Citation: Physical Review B, 1990, Vol. 42, p6138
Abstract: I have calculated the ground-state energy and wave function of a single (pair of) hole(s) moving in a two-dimensional antiferromagnetically correlated background in the self-retracing-path approximation within the t-J model. The confining potential due to the string of overturned spins is treated quasistatically in the strong-coupling limit. I find that (i) an isolated hole is autolocalized at discrete energy levels, broadened presumably into narrow resonances due to failure of the quasistatic approximation, (ii) a pair of holes bind for J/t>0.45 in the dilute limit δ→0, but (iii) higher concentration favors delocalization of holes by pairing. This has observable consequences for the normal-state transport and optical absorption in the high-Tc cuprate superconductors.
Description: Restricted Access
URI: http://hdl.handle.net/2289/5216
ISSN: 1098-0121
1550-235X (Online)
Alternative Location: http://dx.doi.org/10.1103/PhysRevB.42.6138
Copyright: 1990 The American Physical Society
Appears in Collections:Research Papers (TP)

Files in This Item:

File Description SizeFormat
1990_Physical Review B_Vol.42_p6138.pdfRestricted Access223.03 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


    RRI Library DSpace